Axially expandable stand for the liquid after treatment of yarn packages



Oct. 27, 1953 E. F. zmes AXIAL-LY EXPANDABLE STAND FOR THE LIQUID AFTER TREATMENT OF YARN PACKAGES Filed Jan. 17, 1949 l/VVH/TOR Patented Oct. 27, 1953 AXIALLY EXPANDABLE STAND FOR THE LIQUID AFTER TREATMENT OF YARN PACKAGES Emil Friedrich Zingg, Berneck, Switzerland, assignor to Societe de la Viscose Suisse, Emmenbrucke, Switzerland Application January 17, 1949, Serial No. 71,274 In Switzerland January 22, 1948 2 Claims. 1

My present invention relates to improvements in axially expandable stand for the liquid aftertreatment of yarn packages, in particular rayon cakes, for liquid after-treatment prior to drying.

The freshly spun artificial silk wound in packages may be after-treated in various ways according to the kind of sp nn p s e p oye Such after-treatment may consist of washing, desulfurizing or, generally, removing impurities introduced during the spinning process, shading off and bleaching, whereupon the material is bleached. Prior to bleaching, the material may undergo dyeing and sizing operations. For textile yarns other than artificial silk, the operations of bleaching, dyeing and sizing, for example, ma enter into consideration. For aftertreatment tubeless wound packages or cakes of artificial silk in a commercial scale, the so-called irrigating method is used most frequently. Great packag weights and modern artificial silk possessing extremely fine fibrillae or filaments require, however, a very long time of treatment. Further, the handling of such large packages in transport is rendered difiicult. According to another frequently applied method of treatment,

the treating liquid is forced through the package under pressure.

In such latter known method, th package or cake is clamped tightly between two plates. Since the package in the zones of restraint, that is along its edges, may be easily damaged and the penetration of the treating liquid into the said zones is rendered difficult, such method is applied only to packages made up of twisted artificial silk yarns. Even such latter packages, however, must be as uniform as possible so as to make a positive treatment possible, that is, in order to prevent a non-union effect of the dye and, thus, the occurrence of stains or differences in hue in the package.

My present invention aims to overcome the said disadvantages in the treatment of tubeless yarn packages, in particular of artificial silk. To such end, the package is mounted on a perforated elastic shell of a stand or holder on which it is exposed to the action of a liquid or liquids moved under pressure from the inside to the outside of said shell and then through the yarn package.

It has been shown in practice that in this manner a positive wet treatment of packages of twisted or non-twisted artificial silk yarns is made possible, even in the case of large size tubeless packages. Further, the method according to my present invention may be used generally for wound packages of any kind of textile yarn and for any liquid which may be used in this connection.

For carrying out such method according to my present invention, a treating stand which also forms part of my invention, has proved of special value. Such stand comprises a liquid supply line communicating with the interior of a resilient shell which is perforated and serves for receiving the yarn package to be treated. The said shell interconnects two hold-down elements disposed on its end faces, one of said elements being displaceably guided to permit change of its distance from the other element.-

One form of such stand is shown, by way oi example, in the accompanying drawing, in which Fig. 1 is a vertical median sectional view of the stand through the shell and Fig. 2 is a sectional view of a portion of Fig. 1,

serving to explain the mode of operation of the stand.

The resilient shell I is made of rubber for example, and is perforated at 2. Only the apertures 2 lying in the plane of the drawing are shown, in reality a great number of narrow apertures 2 are provided, which are disposed uniformly distributed over the entire surface of the shell I. The dimensions of the latter are adapted to the inside dimensions of the package or cake A to be treated. The shell I is secured at its end faces to a lower circular bed plate 4 and to an upper circular plate 5 by means of inwardly bent flanges 3 and an auxiliary ring 6- and bolts I. A central spindle 8 traverses the lower plate 4 by means of its shouldered and threaded foot portion 9. The said plate 4 is secured to the spindle 8 by means of a nut ID. The said spindle portion 9, further, traverses an aperture provided in the bottom of an open tank II, and a nut l2 screwed onto the spindle portion 9 secures the tank II to the spindle 8. The spindle portion 9 forms a pipe connection and is provided with transverse bores l3 within the range of the inside space of the shell I. tion of the spindle portion 9 serves for connection to a pipe (not shown) through which the treating liquid is supplied. A stud I4 is mounted axially displaceably in an upper longitudinal bore The lower end porgaged on the threaded upper end. portion 20 of the stud M. The said cover I8 is provided with a central aperture for receiving the stud endportion 20, and forms a hood disposed at some distance from the upper end of the shell 1. Within the range of the latter, the cover 18 comprises an outwardly projecting flange 2| having bores 22 which serve for the passage of treating liquid. In similar manner and for the same purpose, the lower plate 4 is provided with cross bores 23. In place of the said bores, suitably adapted grooves or channels also could be pro vided.

The package A, which is formed of freshly spun artificial silk, is cross-wound and protected by cloths (not shown) wrapped about the same. The package A is put over the shell I so as to be freely supported on the lower plate 4. After the cover l8, which has been detached from the stud 14 prior to mounting the cake A onto the shell I, has again been secured to the stud M, the cake is ready to receive its treatment, an annular space being left between the inner face of the package A and the shell I. For the purpose of giving the artificial silk cake A its final wet treatment, the appropriate treating liquid is admitted under pressure through the lower spindle portion 9 into the space defined by the shell I and the plates 4 and 5. The shell space is filled by the liquid supplied through the apertures l3, and the shell I is radially expanded so as to fit snugly the inside face of the cake A. The liquid then flows through the apertures 2 into the cake A, the said apertures having been widened on account of the expansion of the shell 1. Due to the fact that the yarn turns of the cake A do not yield radially, the cake will only yield in the axial direction of the shell I, as shown by the arrow in Fig. 2. The angle of crossing a of the yarn windings is changed correspondingly, and the cake A, thus, is slacked or loosened, that is, rendered more permeable to the liquid. After the latter has passed through the cake, it is caught in the tank H from which it is run, according to the manner of treatment for the cake A, to waste or into a collecting vat forrecycling.

Ihe axial elongation or growth of the package A is limited to the desired height by means of the cover l8. In Fig. 1, the latter is shown in its lowermost position in which the crosspin 15 secured to the stud [4 contacts the lower end of the two guide slots 16. Mechanical means may be provided which permit axial adjustment of the cover I8 as desired on the stud 14, that is, its axial distance from the bed plate 4.

The method described eliminates the. necessity of providing a sealing closure of the yarn package A on its end faces. The edges of the package, therefore, are stressed only to a nominal extent, that is, are gently treated. The amount of treating liquid passing through the package A is, for a given cross-wound package, a function of the pressure, the number and size (diameter) Of the holes 2 in the shell I, and of the elongation of the package. In practice, the amount of liquid may easily be varied in the limits 1:20. The duration of treatment is decreased with an increasing rate of flow of liquid through the package. For example, cakes of artificial silk containing mineral acid, which ordinarily have to be irrigated for 60 hours, can be freed from the acid in ten minutes when treating the same in accord with my present.

4 invention, Without impairing the windability of the package.

When the treatment of the cake A is nearing its end, the inflow of liquid is interrupted, the cover I8 is dismounted and the cake A removed.

The holding plates 4, 5 consist of corrosionresistant material.

Obviously a plurality of stands constructed and arranged for operation as set forth, may be combined into a multiple series of such stands.

What I claim as new and desire to secure by Letters Patent, is:

1 Apparatus for use in the Wet after-treatment of a package of rayon filament yarn, comprising an elongated perforated, open ended, resilientshell, around Which the package of yarn is to be placed for treatment, said shell having at each end an inwardly extending flange, a lower bed plate secured to the lower flange of said shell and an upper plate secured to the upper flange of said shell, a central spindle having an axial bore at its upper end and being threaded at its lower end portion, penetrating into said lower bed plate, and fixed thereto by a nut engaging said threaded portion, a stud slidable in said bore, a collar on the upper part of the stud above said upper flange, said stud being threaded above said collar, a cover mounted on said stud and having a. perforated flange extending outwardly from around the threaded portion of the stud, a winged screw nut securing the cover on the stud, said spindle having an axial bore in its lower part and said spindle having transverse holes connecting said bore with the inside space of said shell, said cover being located initially at a greater distance from the bed plate on which the package rests about the shell than the length, of the package to be treated, and which cover, together with the bed plate, serves for limiting axial expansion of the package, caused by a, treating liquid supplied under pressure within, the perforated resilient shell during treatment through the lower bore and transverse holes in the spindle.

2. Apparatus according to claim, 1, and in which said spindle has a pair of diametrically pposite axial guide slots. through its walls at its axially bored portion, said stud having a cross pin slidably engaging in said guide slots of the spindle for limiting the upward displacement of the cover under the influence of the axially expanding package.

EMIL FRIEDRICH ZINGG.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,507,839 La Fayette Sept. 9,-1924 1,706,826 Steiger Mar. 26, 1929 1,783,908 Hebden Dec. 2, 1930 1,859,037 Huttinger May 17, 1932 1,938,830 Herrmann Dec. 1 1933 2,218,664 Stienen Oct. 22, 1940 2,226,394 Stienen Dec. 24, 1940 2,260,755 Poetzsch Oct. 28, 1941 2,306,719 Drum el; al Dec. 29, 1942 2,395,256 Devos Feb. 19, 1946 2,437,987 Wolfenden Mar. 16, 1948 2,498,540 Fryer- Feb. 21, 1950 FOREIGN PATENTS Number Country Date 554,588 Germany July 9, 1932 

